Agilent 08495-90025 - Manuals

8494/95/96G/H Operating And Service Manual v Service and Support Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products. Any adjustment, maintenance, or repair of this product must be performed by qualified personnel. Contact your cust...

vi 8494/95/96G/H Operating And Service Manual Instrument Markings Safety Earth Ground This is a Safety Class I product (provided with a protective earthing terminal). An uninterruptible safety earth ground must be provided from the main power source to the product input wiring terminals, power cord,...

8494/95/96G/H Operating And Service Manual 1 Overview This manual contains operating instructions for the Agilent 8494G/H, 8495G/H, and 8496G/H attenuators. Included in the manual is information required to install and test these attenuators. Specification Instrument specifications are indicated in ...

2 8494/95/96G/H Operating And Service Manual Overview Figure 1 Typical Four Section Attenuator Schematic Diagram Table 1 and Table 2 on page 3 and Table 3 on page 4 show the typical switching arrangement to increase the amount of attenuation in an 8494G/H, 8495G/H, or 8496G/H in a linear manner. To ...

8494/95/96G/H Operating And Service Manual 3 Overview Table 2 8495G/H Attenuator Switching Order Table 1 8494G/H Attenuator Switching Order 8494G/H Attenuator Sections Atten (dB) 1 1 dB 2 2 dB 3 4 dB 4 4 dB 0 1 X 2 X 3 X X 4 X 5 X X 6 X X 7 X X X 8 X X 9 X X X 10 X X X 11 X X X X 8495G/H Attenuator ...

4 8494/95/96G/H Operating And Service Manual Overview Table 3 8496G/H Attenuator Switching Order Each solenoid requires a drive of 20 to 30 V with a switching current of approximately 125 mA * at 24 V dc per section. The solenoid switching time is less than 20 milliseconds including settling time. O...

8494/95/96G/H Operating And Service Manual 5 Overview Figure 2 Typical Solenoid Coil Driver Circuits CAUTION Do not exceed the RF power rating of 1 W average or 100 W peak with a maximum pulse width of 10 µ s. Do not connect an attenuator RF input or output connector to greater the ±7 Vdc. If the at...

6 8494/95/96G/H Operating And Service Manual Specifications Specifications Frequency Range and Attenuation Attenuation Accuracy (±dB): (Referenced from 0 dB) Instrument Frequency Range Attenuation 8494G dc to 4 GHz 0 dB to 11 dB in 1 dB steps 8494H dc to 18 GHz 0 dB to 11 dB in 1 dB steps 8495G dc t...

8494/95/96G/H Operating And Service Manual 7 Specifications Maximum SWR Maximum Residual Attenuation Attenuation Repeatability ±0.01 dB typical after 5 million cycles RF Power Handling Capability 1 W average, 100 W peak with maximum pulse width of 10 microseconds (all models) Solenoid Drive Instrume...

8 8494/95/96G/H Operating And Service Manual Specifications Solenoid Cable Connector Refer also to Figure 3 . Figure 3 Solenoid Cable Pin Configuration Section Section 1 Section 2 Section 3 Section 4 Power Solenoid Coil Thru-Line Atten Card Thru-Line Atten Card Thru-Line Atten Card Thru-Line Atten C...

8494/95/96G/H Operating And Service Manual 9 Specifications Minimum Life >5 million cycles per section Switching speed Maximum 20 milliseconds including settling time. Environment Limits The instrument should be stored in a clean, dry environment. The following environmental limits apply to stora...

10 8494/95/96G/H Operating And Service Manual Installation Installation Initial Inspection Inspect the shipping container for damage. If the shipping container or cushioning material is damaged, it should be kept until the contents of the shipment have been checked for completeness and the instrumen...

12 8494/95/96G/H Operating And Service Manual Operating Instructions Operating Instructions CAUTION Do not apply RF power greater than 1 W average, or 100 W peak with a maximum pulse width of 10 microseconds. If these limits are exceeded, the attenuators may be damaged. CAUTION Do not ground both so...

8494/95/96G/H Operating And Service Manual 13 Operating Instructions Procedure 1. Connect equipment as shown in Figure 4 on page 12 with the attenuator set to 0 dB attenuation. 2. Set the test oscillator to 0.3 Vrms at 1 kHz. 3. Set SWR meter range to 2 dB (expanded) [or for the 8494G/H to 10 dB (ex...

14 8494/95/96G/H Operating And Service Manual Operating Instructions Performance Tests The instrument can be tested to the accuracy of the “Specifications” on page 6 , with an automatic network analyzer or equivalent equipment of suitable accuracy. If an automatic network analyzer is available, test...

8494/95/96G/H Operating And Service Manual 15 Replaceable Parts Replaceable Parts Table 5 lists the replaceable parts which are the only parts that can be replaced without access to the interior of the instrument. If any parts not listed below need replacement, return the instrument to Agilent Techn...

16 8494/95/96G/H Operating And Service Manual Service Service Troubleshooting Troubleshooting consists of performing the “Operator’s Check” on page 12 . If the instrument does not perform within limits, return the instrument to Agilent Technologies. Repair The only recommended field repair is replac...

8494/95/96G/H Operating And Service Manual 17 Service 4. Close the gap between coupling nut with the nut on the extended-sleeve connector. To disconnect: 1. Loosen the coupling nut of the connector showing the wider gold band. CAUTION Part the connectors carefully to prevent striking the inner condu...

18 8494/95/96G/H Operating And Service Manual Service CAUTION Do not use aromatic or chlorinated hydrocarbons, esters, ethers, terpenes, higher alcohols, ketones, or ether-alcohols such as benzene, toluene, turpentine, dioxane, gasoline, cellosolve acetate, or carbon tetrachloride. Keep exposure of ...

8494/95/96G/H Operating And Service Manual 19 Service 3. Allow the jaws of the tool used to close and pull straight back from the connector without twisting. The contact should come with the tool. If not, repeat the process. Do not reuse the contact. 4. Snap in a new contact by pushing it in place. ...